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The NGPI provides a variety of educational and training opportunities for mental health professionals seeking to learn about group dynamics and develop their capacity to become effective psychodynamically-oriented group therapists.

  • 2-Year Intensive Training Program: This cycle of six 2-day, in-person conferences is the cornerstone of the NGPI. The Program is designed to examine group therapy through a variety of contemporary theoretical lenses and immerse participants in experiential small and large group activities that bring those theories to life and highlight the intersection of intrapsychic dynamics, group process, identity, and cultural context. Ultimately, our aim is to build a skilled and aware community of group therapists and contribute to a broader dialogue of hope, healing, and growth. The next 2-Year cycle is scheduled to begin in November 2024 and run through April 2026.
  • Basic Principles of Group PsychotherapyThis 5-week course (15 hours) teaches students the fundamentals of group theory and therapy and satisfies the didactic requirement for those seeking the Certified Group Psychotherapist (CGP) credential. The next Basic Principles course will begin in Spring 2024.
  • “Special Topics” Conferences: These stand-alone educational and experiential events address small and large group dynamics and group treatment from a variety of unique perspectives. Our upcoming full-day conference, “Peace & Conflict, Power & Privilege: Co-existing in the Face of Difference and Trauma" will take place on April 27, 2024 at the Friends Meeting House in Washington, DC.



Rachel Miller, PsyD, CGP

Rachel Miller, PsyD, CGP, is a clinical psychologist and Certified Group Psychotherapist in private practice in Dupont Circle since 2005. She provides individual, couples and group psychotherapy, clinical supervision and professional consultation. Dr. Miller completed the National Group Psychotherapy Institute (NGPI) at the Washington School of Psychiatry and is thrilled to Co-Chair the program she credits with igniting her passion for group psychotherapy. Prior to her NGPI faculty appointment, she taught and provided supervision to pre- and post-doctoral trainees as Adjunct Faculty at Georgetown University’s Counseling and Psychiatric Services (CAPS). Additionally, Dr. Miller is the co-founder and co-director of Prentice, a training institute that guides new professionals on the path toward becoming private practitioners. Dr. Miller completed a two-year advanced training program on couples therapy from the Institute of Contemporary Psychotherapy and Psychoanalysis. In her private practice, Dr. Miller leads multiple process groups and serves as a small process group leader in the NGPI.

Jonathan Stillerman, PhD, CGP

Jonathan Stillerman, PhD, CGP, is a clinical psychologist and Certified Group Psychotherapist with a private practice of psychotherapy, supervision and consultation in Washington, DC. As faculty at the New Washington School of Psychiatry, Dr. Stillerman teaches group therapy in the Clinical Program on Psychotherapy Practice and serves as Co-Chair of the National Group Psychotherapy Institute. He held previous appointments as Adjunct Faculty at The American University and Assistant Clinical Professor of Clinical Psychology at The George Washington University. Dr. Stillerman has been leading groups for 25 years and currently runs several weekly therapy groups and a training group specifically for group therapists. In 2019, he was the featured speaker at the Mid-Atlantic Group Psychotherapy Society’s fall conference on group therapist self-disclosure. Alongside his clinical practice and teaching, Dr. Stillerman is a published poet, and in a former life, he co-founded and co-directed Men Can Stop Rape, non-profit empowering male youth to prevent gender-based violence.


Kavita Avula, PsyD, CGP

Kavita Avula, PsyD, CGP is an Indian-American licensed clinical psychologist who specializes in trauma, international psychology, unconscious bias, and large group dynamics.  For decades, Dr. Avula has served as a thought leader and partner to humanitarian and human rights organizations. She has traveled to four continents to facilitate healing and recovery in the face of war and natural disasters. She founded Therapist Beyond Borders, a boutique consulting firm that offers conflict resolution and facilitates culture change at institutions that know they are stuck. She dedicates a portion of her time to serving the Black, Brown, Indigenous, and other People of Color (BBIPOC) community and offered the first ever BBIPOC Institute at AGPA. Dr. Avula was former President of the Puget Sound Group Psychotherapy Network and has been a featured speaker at conferences nationally. When she is not facilitating a group, she can be found traveling with her family, hiking, or on a tennis court.


Maryetta Andrews-Sachs, MA, CGP, AGPA-F

Kirsten Chadwick, PhD, CGP

Jessica Chan, MSW, CGP

Mary Tatum Chappell, PsyD, CGP 

Molly Walsh Donovan, PhD, CGP, AGPA-F 

Karen Eberwein, PsyD, ABPP, CGP 

Ronald Hopson, PhD

Stacey Jackson-Lampley, PhD 

Bradley Lake, MSW, CGP 

Victoria Lee, PhD, CGP 

Farooq Mohyuddin, MD, CGP, AGPA-F 

Reginald Nettles, PhD, CGP 

Leon Paparella, MSW, CGP 

Bruce Pickle, PsyD, CGP 

Robert Schulte, MSW, CGP 

Rosemary Segalla, PhD, ABPP, CGP, AGPA-F

Christopher Straley, MSW, CGP, CST 

Steve Van Wagoner, PhD, CGP, AGPA-F

Ayana Watkins-Northern, PhD, CGP, AGPA-F 


The National Group Psychotherapy Institute joined the New Washington School of Psychiatry in 2024 after 30 years as an integral part of the Washington School of Psychiatry. NGPI holds the distinction of being the only postgraduate group therapy training program in the Washington, DC metropolitan area and one of only a handful across the United States. In 2016, NGPI received the prestigious Harold S. Bernard Group Psychotherapy Training Award from the American Group Psychotherapy Association in recognition of its “outstanding contributions in education and training in the field of group psychotherapy.” Since its inception, more than 400 professionals – social workers, psychologists, counselors, psychiatrists and psychiatric nurses – have completed the 2-year Program, some coming to train from as far away as Europe. Many graduates have gone on to make significant contributions to the field of group therapy, and many of the current NGPI faculty are leaders in the American Group Psychotherapy Association and its local affiliate, the Mid-Atlantic Group Psychotherapy Society.


2-YEAR INTENSIVE TRAINING PROGRAM - Click here for further information

BASIC PRINCIPLES OF GROUP PSYCHOTHERAPY - Click here for further information

"SPECIAL TOPICS" CONFERENCE - Click here for further information

Click here to register for NGPI Training Programs.

Click here for Accreditation Statement and AMEDCO Continuing Education Certification

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